Mine-haulage locomotive.



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' MINE HAULAGE LCOMOTIVE.4

(Applieatib med my a1, 1694.)

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- C. E. DAVIS.

MINE HAULAGE LOCOMOTlVE.

(Application led May 31, 1894.) 4 Sheets-Sheet 4. l

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MINE-HAU LAGE LCOlI/IOTIVE.

srEcIFrcArxoN refining part of Letters Patent N; 645,553, date March 20,1eoo`.

Application iiled May 8l, 1894. Serial No. 513,015. (No mocleL To all t/'tom t may concern:

Be it known that I, CHARLES E. DAVIS, a citizen of the United States, residing at Ghicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Mine-Haulage Locomotives, of which the following is a specification.

My invention relates to mine-locomotives, and has for its object to produce an improved locomotive for use in mines, of which the following is a description, reference being had to the accompanying drawings, wherein- Figure 1 is a plan view of motor and associated parts. Fig. 2 is a section on line 2 2, Fig. l. Fig. 3 is a section on line 3 3, Fig. 4. Fig. 4 is a detailed plan View, with parts removed, of the swiveled axle. Fig. 5 is a section on line 5 5, Fig. 3. Fig. 6 is a section on line 6 6, Fig. 1. Fig. 7 is a plan view of a modification. Fig. 8 is a plan View of asecond modification. Fig. 9 Vis a diagrammatic view of the electrical connections of Fig. 8. Fig. 10 is a detail.

Like letters refer to like parts throughout the several figures.

I have shown in the accompanying drawings a locomotive to be used for hauling in mines or the like. It is often the case in such places that the track upon which the locomotive must run is uneven, and hence only three of the driving-wheels, as such locomotives are now constructed, will rest upon the rails at one time. When this occurs, the tractive power of the locomotive is decreased and other evils result. In my locomotive these evils are avoided by constructing the axle of one pair of drivers, so that it is free to move with relation to the remaining parts of the locomotive.

As shown in Figs. l and 2, A is the armature, and A the field-magnets, of the electric motor that drives the locomotive. Keyed to each end of the armature-shaft A2 are the bevel-pinions B and C, which mesh with the bevelgears B and C on the shafts B2 C2. These shafts work in the bearings B3 C2 and are provided at one end with the pinions B4 C4, which mesh with the gears B5 C5, rigidly attached to the driving-wheels B6 C6 on the axles B7 C7. (See Fig. 4.) B8 C8 are the bearings in which said axles work. The bearings Bg of the axle B7 are attached to the ends of the arms B9 B9, (see Figs. 4 and 5,) rigidly connected with and projecting from the sides of the cylindrical part D,which acts as a bearing for the armature-shaft A2. Projecting from the ends of the cylinder D are the arms D D', to which are fastened the bearings B3 of the shaft B2. Said cylinder is provided with the flange D2. Theprojecting ends A2 of the ieldmagnets A form a bearing in which the cylinder D may rock. It will be seen that by this construction the cylinder D, axle B2, driving-wheels B6, gear-wheel B5, pinion B4, shaft B2, and bevel-gear B', may rock about the armature-shaft A2 in the bearing provided by the projecting parts A3 A2 of the pole-pieces Awithout affecting the engagement between the pinion B and bevel-gear B, and hence said driving-wheels may adjust themselves to the irregularities of the track, so that all four driving-wheels will be on the track at all times. The bearings C8 of the axle C7 are rigidly attached to the frame of the motorV in any convenient way.

I have shown in Fig. 7 a modification in ,which the armature-shaft A2 has only one pinion C, which by means of the intervening mechanism Ydrives the wheels C6, the wheels B6 on the swiveled axle being driven by the connecting-rods E E.

In Fig. 8 I have shown a modification in which two armatures A H on separate shafts are used. The armature A drives the Wheels B0 on the swiveled shaft and the armature II the wheels Cf on the stationary shaft. The driving-wheels are connected by the rods E E.

When two motors are used, I arrange the circuits so that when the motors are rst started they will be in series, so as to get a greater power with slower speed. After the locomotive is in motion I change the circuits, so that the motors will be in multiple and the speed increased. Fig. 9 shows a diagram of these circuits. I is the Wire leading from the trolley-wheel I' in contact with the trolleywire I2 to the contact-plate I4, attached to but insulated from the movable arm M. I5 is the resistance-wire cut in or out of circuit by the movement of the arm M along the are I6. The wire I2 connects one end of said resistance-wire with the iield-coils I2. Said ield- IOO coils are connected to one pole of the reversing-switch K, which is connected to armature A by Wire K. Armature A is connected to the other pole of the reversing-switch K by wire K2. The wire I9 connects said switch with the conductor M', which is connected to the conductor or plate M2 by the plate M2 on the arm M. Tire I9 is connected to the short conductor M4 by wire M5. Conductor M2 is connected by wire M6 to field-magnet coils M7. Vire M6 is connected with conductor ME by wire M2. y Said field-coils are connected to one pole of the reversing-switch L, which is connected by wire L to armature H. The wire L2 connects said armature wi th the other pole of switch L, which is connected to the ground by wire N. The short conductor N' is connected to the ground by wire N2. The rcversingswitches K and L are connected by the rod L3 and are controlled b v the lever or handle L4.

Fig. IO is a detailed View showing the manner in which the connecting-rods are attached to the driving-wheels. A ball E' surrounds the wrist-pin E2 and is held in place in any suitable manner, as by the nuts E3 E2. The box on the end of the connecting-rod is lined with the Babbitt metal E4. This construction allows of a universal motion, which is necessary on account of the motion of the swiveled axle.

I have described my locomotive as shown in the drawings; but it is evident that these several parts may be varied in form, construction, and arrangement without departing from the spirit of my invention, and I therefore do not wish to be limited to the construction shown.

The use and operation of my invention are as follows: As shown in Figs. I and 2, the motion of armature A is communicated to the driving-wheels B6 by pinion B, bevel-gear B', shaft B2, pinion B4, and gear-wheel B5. The wheels C6 are driven in the same manner by pinion C, dac. In mines the tracks upon which the locomotive runs are often very uneven, so that locomotives as generally constructed" have at times only three drivingwheels on the track at once. This causes, among other evils, a decrease in the tractive power. If when thelocomotive is constructed as herein described the track is uneven, the axle of the wheels Beand accompanying parts will move, so as to keep all four of the wheels on the track. Since these parts rotate or rock about the motor-shaft A2, the pinion B and bevel-gear B' will always be in engagement and the driving power will not be affected.

In the modification shown in Fig. 7 the stationary axle of the driving-wheels C6 is driven by the motor, the motion being com municated to the drivers on the pivoted or movable-axle bythe connecting-rods E E.

In Fig. 8 I have shown two motors, one to each pair of driving-wheels. In starting the locomotive the motors are coupled in series,

and after the machine is in motion are changed so as to be in multiple. The circuits when the motors are first started up will be as follows, Fig. 9: from trolley-wire I2 through wire I to plate I4, thence through resistance I5, wire I7, field-coils Is, wire K', armature A, wires K2 and I9 to conductor M', thence by plate M3 to conductor M2, thence by wire M, field-coils M7, wire L', armature II, wires L2 and N to ground. After the motors have reached the required speed the arm M is moved until plates I4 and M2 come in contact with conductors M8, M4, and N'. When this occurs, the resistance I5 is all cut out and the motors are in multiple, the circuits being traced as follows: from trolley-wire I2 through wire I, plate I4, wire I7, field-coil I8, wire K', armature A, wire K2, Wire I2, wire M5, conductor M4, plate M3, conductor N', and wire N2 to ground. The current divides at plate I4, part going by way of conductor MS, wire M2, wire M6, eld-coils M7, wire L', armature II, and wires L2 and B to ground.

-When it is desired to reverse the motors, the switches K and L are moved in any suitable manner, as by means of the handle L4 and rod L2, until they take the position shown in dotted lines. When in this position, the current through the armaturesis reversed, and hence the motors will be reversed.

Fig. lO shows a manner of attaching the connecting-rods E E to the driving-wheels B6 C6 that allows said rods to accommodate themselves to the different positions of the driving-wheels, due to the motion of the swiveled axle.

I claim- 1. A mine-locomotive comprising an armature and shaft, a fixed axle and a swiveled axle, said swiveled axle working in bearings rigidly attached to a cylindrical piece which acts as a bearing for one end of the armatureshaft and which' moves with said axle substantially as described.`

2. A mine-locomotive comprising a swiv= eled axle rigidly connected to a cylindrical piece through which the armature shaft passes, a shaft supported by arms projecting from said cylindrical piece, a bevel gear and Vpinion on said shaft and the latter engaging a gear wheel connected with the swiveled axle, whereby the motion of the armatureshaft is communicated to the swiveled axle in all its diiferent positions, substantially as described.

3. A mine-locomotive, comprising a fixed axle and an axlemovable in a vertical plane, a dynamo-electric machine having an armature-shaft operatively connected with said movable axle, said movable axle being at an angle with said armature-shaft and adapted to move around said armature-shaft as a center.

4. A mine-locomotive comprising two axles, one of said axles being swiveled so as to move with relation to the frame without varying the horizontal distance between the axles, two motors with seriesmultiple connections to the source of electrical supply, power-driving connections from each motor to the axles of the locomotive, and mechanical couplings loe-` tween theaxles.

5. A mine locomotive comprising four wheels, the axle of one pair of wheels being swiveled so as to move with relation to the frame in a plane substantially perpendicular to said frame, side couplings between the different pairs of Wheels comprising a connecting-rod provided at each end With a concave spherical-shaped surface adapted to Work on the surface of a ball or sphere surrounding the Wrist-pin that projects from the Wheels, substantially as described.

6. A mine-locomotive, comprising an armature-shaft, a fixed axle and a swiveled axle, said swiveled axle Working in bearings rigidly attached to a cylindrical piece, a bearing in said cylindrical piece for the armatureshaft, said cylindrical piece movably mountLA ed in the stationary part of the frame.

7. A mine locomotive, comprising a dynamo-electric machine provided with an armature and suitable pole-pieces, a fixed axle and sWiveled axle, said swiveled axle Working in bearings rigidly attached to a cylinA drical piece, a bearing in said cylindrical piece for one end of the armature-shaft, said cylindrical piece rotatably mounted in the frame of the dynamoJelect-ric machine, and a connection between the armature-shaft and said swiveled axle.

CHARLES E. DAVIS. Witnesses DONALD M. CARTER, WALTER J. GUNTHORR 

